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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ 1069 + 69 is prime. [Gupta]

+ sigma(69) = 96. [Honaker]

+ The sum of the first non-primes less than or equal to 69 is prime. [Patterson]

+ 100^69 - 69 is prime. Note that 69 is the smallest number with this property. [Firoozbakht]

+ The smallest strobogrammatic semiprime. [Capelle]

+ Strobogrammatic primes that don't use 6 or 9 are dihedral primes.

+ pi(6) * prime(9) = 69. [Gupta]

+ The concatenation in order of all the non-prime numbers 1 through 69 is the largest non-titanic prime formed by this way, i.e., 14689101214151618202122242526272830323334353638394042444546484950515254555657586062636465666869. [Loungrides]

(There are 5 curios for this number that have not yet been approved by an editor.)




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